Here is the full list of all 30 BattleBlock Theater achievements.
Complete 10 user-created levels in a single Featured Story playlist.
Free all the prisoners in the Gift Shop by unlocking or trading.
Get a letter grade in every level (except Encores) in insane solo story mode.
Get a letter grade in every level (except Encores) in insane co-op story mode.
Get a letter grade in every level (except Encores) in Normal Solo Story Mode.
Complete all the Encores in any mode.
Be on the winning team in one arena match of every mode.
Get a letter grade in every level (except Encores) in Normal Co-op Story Mode.
Get a letter grade in all eight finales in any mode.
Collect all the prisoners of one head shape.
Be on the winning team in 100 arena matches.
Use each weapon successfully.
Successfully use every melee attack move.
Collect 10 Golden Hats.
Download and host a game of user-created levels.
Make a trade with someone.
Play with the Behemoth or someone with this achievement in an online game.
Complete the first four finales in any mode.
Kill your teammate 50 times.
Collect all the weapons in the Gift Shop by unlocking or trading.
Die enough times and we give you a prize.
Get eaten alive.
Free 50 prisoners in the Gift Shop.
Get 100 kills.
Complete an encore level in Story Mode.
Get an A++ in 10 levels.
Free a fellow prisoner.
Get yourself a cool new weapon.
Find a secret level.
Complete the story's opening sequence in any mode.